|Publication number||US20070109209 A1|
|Application number||US 11/545,716|
|Publication date||May 17, 2007|
|Filing date||Oct 10, 2006|
|Priority date||Mar 9, 2001|
|Also published as||CA2439724A1, CA2439724C, EP1419550A2, EP2073311A1, US6819292, US6954178, US7126551, US7343795, US8109131, US20020145568, US20040056807, US20050035914, US20050212710, US20080209985, US20120191380, WO2002073735A2, WO2002073735A3|
|Publication number||11545716, 545716, US 2007/0109209 A1, US 2007/109209 A1, US 20070109209 A1, US 20070109209A1, US 2007109209 A1, US 2007109209A1, US-A1-20070109209, US-A1-2007109209, US2007/0109209A1, US2007/109209A1, US20070109209 A1, US20070109209A1, US2007109209 A1, US2007109209A1|
|Original Assignee||Arad Measuring Technologies Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (7), Classifications (37), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention claims the benefit of U.S. Provisional Application Ser. No. 60/274,812 filed Mar. 9, 2001 entitled “Meter Register” which is hereby incorporated by reference in its entirety.
1. Field of the Invention
The present invention relates to meter registers and, more particularly, to meter registers for remote reading.
2. Description of Related Art
Presently, many locales visually read utility meters to determine utility consumption. The meters, such as water meters, include an odometer that identifies the consumption of the water consumed. The odometer is read periodically and the difference between the present and the prior reading determines the amount of utility water used. For example, if the most recent water meter reading was 2 million gallons or liters and the previous water meter reading was 1.8 million gallons or liters, then 200,000 gallons or liters of water were consumed. This procedure of individually reading water meters is time consuming, labor intensive, and expensive. In a competitive market, such an expense affects profitability to the utility provider. This is especially a problem in submetering markets where a separate entity may have to be employed to read water meters in apartment buildings and apartment building complexes.
Subsequently, systems were developed relating to remote reading systems. One such system is described in U.S. Pat. No. 5,111,407 to Galpern and entitled “System for Measuring and Recording a Utility Consumption”. This particular arrangement incorporated a transponder and receiver arrangement whereby a meter reader placed a meter reading device in close proximity to a transponder for a meter reading. This arrangement reduced the time spent by the meter reader on an individual site and more accurately recorded utility consumption. However, meter reading was still a labor intensive process.
Subsequently, meter reading systems have evolved whereby they are either connected to telephone lines and/or transmitters which transmit radio waves to a central location. In many instances, this eliminates many of the problems associated with utility consumption reading.
However, a problem has always existed with utility meters in that the register required substantial modification to retrofit the meter to attach a transponder. One solution was to make a hole in the register glass to attach a wire or antenna. Other solutions included drilling holes in the register case to accomplish the same goal. Problems occur when one attempts to drill through the register case, namely, moisture buildup in the register case. The moisture buildup can corrode metallic parts and/or cause short circuiting of the electrical components.
Therefore, it is an object of the present invention to overcome the deficiencies of the prior art.
The present invention is an antenna for transmitting a radio frequency signal that includes a first electrically conductive sheet, a second electrically conductive sheet spaced a first distance apart from the first electrically conductive sheet, and an axially extending leg electrically connected to the first electrically conductive sheet and the second electrically conductive sheet. The axially extending leg is electrically conductive. Preferably, the antenna is made of metal and made of a unitary sheet of metal.
The present antenna can be incorporated in a meter register that includes a register body. A rotatable drive shaft is coupled to the register body and a drive gear is attached to the drive shaft. At least one follower gear is rotatably attached to the register body and coupled with the drive gear.
Further, the present invention is a utility meter that includes a meter body having a chamber through which material passes. A measuring unit is contained within the chamber. The chamber includes a rotating member having a magnetic member and a sealed register attached to the chamber. The sealed register includes a corresponding magnetic member attached to the drive shaft coacting with the magnetic member and the above-described antenna.
The present invention is, also an antenna adapter that includes a circular metallic ring, a first electrically conductive sheet, and a second electrically conductive sheet axially spaced from the first electrically conductive sheet. A cable electrically connects the metallic ring to the first electrically conductive sheet and the second electrically sheet whereby the metallic ring is adapted to be secured to an exterior portion of the meter register.
The present invention is also a method for measuring a utility that includes steps of providing a meter, providing meter register, transmitting a signal from the meter register, the signal identifying the meter type identification code and utility consumption, and receiving the information by a central authority.
The present invention is also directed to a method and apparatus to detect fluid flow movement through a meter via the meter register that includes a magnet rotatably coupled to a register drive shaft and magnetically coacting with magnetically activated switches. The position of the magnet relative to the magnetically activated switches determines position of the magnet. Over a period of time, the direction of movement of the magnet can be determined, which in turn is correlated to the direction of the movement of the drive shaft and material flowing through the meter register.
A magnetic direction detection arrangement 58 is provided on a lower portion of the subassembly 26 and includes reed switches 54 and 56. The reed switches 54 and 56 are magnetically activated switches. The reed switches 54 and 56 extend along axes A and B. Axes A and B are parallel to each other. Further, the reed switches 54 and 56 are radially spaced apart from each other as depicted by r in
Referring back to
An electronics package 68 is provided within the register 20. The electronic package 68 includes the board 70 that has a microprocessor 72 which is electrically coupled to the batteries 50 and 52.
The register 20 includes an antenna 74 is electronically coupled to the microprocessor 72. As shown in
More specifically, the antenna 74 includes a first electrically conductive sheet 80, a second electrically coupled conductive sheet 76 spaced a first distance apart X from the first metallic sheet 80, and an axially extending leg 78 electrically connected to the first electrically conductive sheet 80 and the second electrically conductive sheet 76. The axially extending leg 78 is likewise electrically conductive. Preferably, the first electrically conductive sheet 80, the second electrically conductive sheet 76, and the axially extending leg 78 are made of metal. More preferably, the first electrically conductive sheet 80, the second electrically conductive sheet 76 and the axially extending member 78 are made from a unitary sheet of metal. The first electrically conductive sheet 80 has a first arcuate-shaped outer edge 100 and the second electrically conductive sheet 76 has a second arcuate outer edge 102 wherein the axially extending member 78 extends from the first arcuate-shaped outer edge 100 to the second arcuate-shaped outer edge 102. The first arcuate-shaped outer edge 100 has a first radius R1 extending from a first center point 104 and a second arcuate-shaped outer edge 102 has a second radius R2 extending from a second center point 106. The first center point 104 and the second center point 106 are contained on a center line 108. The first electrically conductive sheet 80 and the second electrically conductive sheet 76 are contained in a first plane 109 and a second plane 110, respectively. The first electrically conductive sheet 80 has a first surface area 112 and a second electrically conductive sheet 76 has a second surface area 114, wherein the first surface area 112 is greater than the second surface area 114. Both the first electrically conductive sheet 80 and the second electrically conductive sheet 76 include cut-out sections 116. The cut-out sections 116 permit the antenna 74 to be accommodated by the meter register 20 by permitting other register components to be received by the cut-out sections 116. For example, the reed switches 54 and 56 are contained within one of the cut-out sections 116. As stated previously, the coaxial cable 82 is electrically coupled to the first electrically conductive sheet 80 and the second electrically conductive sheet 76. Preferably, the distance X is approximately equal to or a multiple of a wavelength distance to be transmitted from the antenna 74. Essentially, the axially extending leg 78 has a length equal to X. Although the antenna 74 shows substantially arcuate and circular sheets, the sheets can also be other shapes, such as rectangular or square, for example.
The metallic cup 24 is electrically coupled to the first electrically conductive sheet 80 and the second electrically conductive sheet 76. The cup 24 is an opened top structure having a cylindrically-shaped side wall 118 attached to a bottom wall 120. The bottom wall 120 slopes away from the opened top portion toward a central axis 122 passing through the cup 24. Preferably, a portion 124 of the bottom wall 120 is frusta-conical in shape. The bottom wall 120 includes a flat central portion 126 connected to an end 128 of the frusta-conical portion 124 that is adapted to receive the magnetic coupling 64. Preferably, the first electrically conductive sheet 80 includes tabs 130 extending therefrom used for contacting the metallic cup 24.
The first electrically conductive sheet 80 is spaced a second distance Y from the bottom wall 120, which is approximately equal to or a multiple of a wavelength to be transmitted by the antenna 74. A portion of the subassembly 26, which includes a mechanical portion 132 of the register 20, that includes the gear train drive 30 is received between the first conductive sheet 80 and the second conductive sheet 76. The electronic package 68 includes an electrical frequency generator 134 coupled to the first conductive sheet 80 via the coaxial cable 82.
The antenna 74 is coupled to the power source, i.e., the batteries 50 and 52, via the frequency generator 134. More specifically, the board 70 includes the frequency generator 134 which is electrically coupled to the first electrically coupled sheet 80.
This present arrangement results in a very compact sealed register 20 which has an internal antenna. The metallic cup 24 also acts as an amplifier for the antenna 74 and forms an antenna structure. The metallic cup 24 also amplifies the radio waves that are emitted from the antenna 74 so that they may be directed externally of the register 20 as shown in
Referring back to the meter register 20, the mechanical portion of the meter register includes a register body 136 having the rotatable shaft or drive shaft 62 coupled thereto. A drive gear 138 is attached to the drive shaft 62 and at least one follower gear 32 is rotatably attached to the register body 136 coupled to the drive gear 138. The antenna 74 is attached to the register body 136, which is sandwiched between the first electrically conductive sheet 80 and the second electrically conductive sheet 76. The odometer 40 is coupled to the drive gear 138 and at least one follower gear 32. The rotatable drive shaft 62 includes a magnetic member or coupling 64 attached to a first end and the indicator 29 which attaches to a second end. The register drive shaft 62 extends along the longitudinal axis 122 and the first electrically conductive sheet 80 is contained in the first plane 109 and the second electrically conductive sheet 76 is contained in a second plane 110, the longitudinal axis 122 being normal to the first plane 109 and the second plane 110.
A rotational direction of the sensing follower gear 32 s can therefore be determined by monitoring the sequence of the first state and second state of the reed switches 54 and 56 as shown in
Also, a magnetically activated switch or reed switch 148 can be provided with the register 20 and coupled to the microprocessor 72. The reed switch 148 is electrically coupled to the microprocessor 72 wherein when a magnetic field activates the magnetically activated switch 148 for a fixed period of time, the register 20 and/or antenna 74 emits a signal that indicates the register has been tampered with.
Preferably, the face cap 22 and metallic cup 24 form the internal seal chamber C via an elastomeric sealing member wherein the sealed chamber receives the register body 12. Preferably, the internal chamber C is at a pressure below atmospheric pressure and, more preferably, at a pressure minus 9 atmospheres. Hence, the microprocessor 72 and antenna 74 are maintained in the evacuated internal chamber C.
In various cases, the meter, particularly the water meter 10, is contained in a pit 150, as shown in
The approximate direction of one antenna 74 is as follows: diameter of the circular section 80 is approximately 2.5″; distance X is approximately 0.75″; and diameter of the arc-shaped section 76′ is approximately 2.5″ for approximately 180° . Likewise, the circular sheets 158 and 160 have a diameter of approximately 2.5″ and spaced apart a distance X′ of approximately 0.75″. It is important to note that no separate electrical power is provided to the auxiliary antenna 154 and that an antenna signal 168 is generated external of the pit 150 via the first pit electrically conductive sheet 158 and the second pit electrically conductive sheet 160.
The following discusses operation of the present invention. Initially, water passes through the inlet 16 causing the measuring chamber 14 to rotate. The water then flows through the outlet 18. The measuring chamber 14 causes the magnetic drive 65 attached to the measuring chamber 14 to rotate. The corresponding magnetic coupling 64 provided in the register 20 is likewise rotated causing the drive shaft 62 to rotate. This in turn causes gears 32 of the gear train drive 30 to rotate which in turn causes the odometer 40 to move indicating the quantity of liquid flowing through the meter. At the same time, the magnet arrangement 34 rotates causing the sensing magnet 142 to rotate about the reed switches 54 and 56. Depending on the sequence of the states of the reed switches 54 and 56 as shown in
Once the water begins to flow from the inlet 16 to the outlet 18, the rotating element in the measuring chamber 14, such as a multi-jet wheel, rotates which in turn causes the magnetic coupling 64 to rotate. This causes the drive shaft 62 to rotate with the respective gear train drive 30. Hence, the dial 29 and the odometer 40 are caused to move. Likewise, the cruciform of the magnetic arrangement 34 rotates. In the present case, the magnetic arrangement 34 includes a single magnet 142. The magnetic field caused by the magnet magnetically coacts with the two reed switches 54 and 56. The state of the reed switches 54 and 56 are affected by the magnetic field of the magnet 142 to determine which sequence can be used to determine the direction of flow through the meter 10 such as, for example, the sequence of reed switches 54 and 56 is as follows: 0,0; 1,0; 1,1; 0,1; 0,0, etc., then this would indicate reverse flow. More than one magnet can be provided in the cruciform magnet arrangement. In the case of three magnets or an odd number of magnets provided in the cruciform section, directional flow can be determined. However, where only two oppositely positioned magnets are provided, or four magnets are provided, in each of the cruciform segments, only an indication of movement or the register can be determined, not the direction of rotation. More particularly, both flow rate and flow direction can be determined if the magnets are arranged in a non-symmetric arrangement about the cruciform, i.e., three magnets or two magnets positioned next to each other.
Further, the signal information provided via the antenna 74 may also include an odometer meter reading corresponding to the meter odometer 40. Furthermore, the register can transmit, periodically or nonperiodically, information through the antenna 74 and identify such information as the meter coating utility consumption. Further, the antenna 74 can not only transmit information signals but, likewise, can receive information signals 194 from a transmitter 196, that is a two-way communication. Preferably, this information can be used to correctly adjust the transmitted meter information indicating the odometer reading and other information. This permits the information to be transmitted via the meter register 20 to be modified in the field without removal of the meter register 20.
The microprocessor 72 can also provide other information related to the operation of the meter. For example, the register 20 can monitor the flow rate via the reed switches 54 and 56, through the meter and, if that information exceeds a fixed flow rate number or the flow rate does not change over a period of time, an alarm can be issued indicating that there may be a leak. Specifically if, for example, the meter 10 can detect a flow rate Q as low as 1 liter or quart per hour and over a fixed period of time t, e.g., thirty minutes, and if Q/t over a fixed period of time, e.g., one hour, remains constant, then this could indicate a leak condition. A low constant flow rate over a period of time could indicate a small leak, such as in a toilet, or a large consistent flow rate over a period of time could indicate that a main water line has failed or a bathtub is overflowing. An alarm can be issued either at the location of the meter, or via e-mail or a telephone message, for example.
Preferably, the batteries 50 and 52 provide power to the electronics of the register at 10 milliwatts and power consumption is typical at 2 microamperes. It is believed that in this arrangement the battery life can be approximately 8 years. Preferably, the antenna 74 transmits data having a 3.3-4 milliseconds length of compression data and the time between transmissions can vary, for example, 6 seconds or twice a day from the meter, depending on the particular situation. The meter 10 can also receive information, i.e., radio signals Q, from a transmitting source TS as shown in
More preferably, the present invention can be utilized in connection with the vehicle 188 which can receive the meter reading signals 186 emitted from the register antenna 74. Specifically, the vehicle 188 can travel a set meter reading route. Along that route the vehicle receiving unit 189 will receive the various radio waves from respective meters 10. The vehicle 188 can be provided with computer assistance to store this information. This information, which includes consumption information, can be sent to a central computer for billing and other information. The vehicle receiving unit can identify if it does not receive the signal from the meter designated on the route. This may indicate that an antenna wire was cut and/or the register was tampered with. An alternative arrangement can be provided that the meter antenna transmits meter reading information to a communication concentrator. This information can be forwarded via a communication line, such as a modem line, or radio waves to a central computer for collation of the information. As described earlier, this information can then be sent to an ASP. This information can be analyzed for billing purposes.
Finally, the information transmitted via the antenna 74 can then be provided through a world-wide-web or internet-based system whereby the user or utility can obtain this information via typing into a computer the user's I.D. number and password at the ASP website. The present invention can also be used in the submetering market, where the submetering entity is responsible for collecting utility fees from users. Such information that may be obtained is meter usage 197 a and billing information 197 b via screens 198 and 200 such as shown in
Having described the presently preferred embodiments of this invention, it is to be understood that it may otherwise be embodied within the scope of the appended claims.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US7446707 *||May 17, 2005||Nov 4, 2008||Micro-Ant, Inc.||Ultra-low profile vehicular antenna methods and systems|
|US7975560||Aug 25, 2008||Jul 12, 2011||Elster Amco Water||Magnetic shield for water meter|
|US8138751 *||Sep 25, 2008||Mar 20, 2012||Cellnet Innovations, Inc.||Magnetic rotation sensing for meter|
|US8157160 *||Jun 23, 2010||Apr 17, 2012||Arad Measuring Technologies Ltd.||Meter register and remote meter reader utilizing a stepper motor|
|US8448845||Feb 6, 2012||May 28, 2013||Arad Measuring Technologies Ltd.||Meter register and remote meter reader utilizing a stepper motor|
|US20050280581 *||May 17, 2005||Dec 22, 2005||Micro-Ant, Inc||Ultra-low profile vehicular antenna methods and systems|
|US20100302061 *||Dec 2, 2010||Arad Measuring Technologies Ltd.||Meter Register and Remote Meter Reader Utilizing a Stepper Motor|
|U.S. Classification||343/719, 343/700.0MS|
|International Classification||G01F15/00, G01F1/075, H01Q9/04, H01Q7/00, G01F15/075, H01Q1/22, H01Q1/04, G01F15/06|
|Cooperative Classification||Y04S20/36, G01D4/006, G01F1/075, G01D5/2515, H01Q9/0421, H01Q7/00, G01F15/063, Y04S20/325, Y02B90/243, H01Q1/22, H01Q9/0407, H01Q1/2233, G01F15/0755, G01F15/007, H01Q9/0414|
|European Classification||G01F15/00K, G01F15/075B, G01F1/075, G01D4/00R2, H01Q9/04B, H01Q9/04B1, G01D5/251B, H01Q7/00, H01Q1/22, G01F15/06B2, H01Q1/22C6, H01Q9/04B2|
|Sep 16, 2008||CC||Certificate of correction|
|Aug 18, 2011||FPAY||Fee payment|
Year of fee payment: 4
|Sep 2, 2015||FPAY||Fee payment|
Year of fee payment: 8